Y/n are an ordinary student with high intelligence until now.. One day next to the body of her murdered uncle,y/n finds a strange puzzle piece, but she can't remember how she got there. 10years later she becomes a criminal profiler to find out the truth, but detective Hansaem remains convinced that she is the killer,she have been following detective Hansaem around. Hansaem is a neat hard-working detective,he still suspects y/n but deep down he adores her Y/n was transferred to violent crime department at han river police station Y/n was just bantering with Hansaem as usual y/n lets out a exasperated sigh “Jeez you’re such a nag” you said “A nag? A nag? You report to me,so you need to watch your mouth and speak respectfully” Kim Hansaem said in disbelief “I don’t wanna” you said “What do you mean? I’m much older and experienced than you” he said “God,you’re such a boomer” you said